This is definitely an underrated song. With this song going, I feel like I can do anything. 

open-your-heart Sonic Adventure

Sonic And The Black Knight - Knight Of The Wind

These themes are all from Sonic Heroes. 4 from the teams, 1 is the main theme, and the other from a secret.

Just another mashup as usual

all credit goes to SEGA and MarioSonic2010 on YouTube